For about 10 years, people have been trying to make a movie about the potential horrors of the online mob.
[...] 2008's "Untraceable," a preachy bit of exploitation about a serial killer broadcasting his murders over the internet.
The complicated truth is that the internet's dangers are entwined with its pleasures, the allure of fame, the illusion of contact with masses of people.
"Nerve" is the first movie to capture all that, and the result is a memorable thriller.
"Nerve" imagines an online game guaranteed to appeal most to that segment of the population that's short on cash and even shorter on common sense - teenagers.